A1324 Hall Effect Sensors , 4 $6.88
XIAO ESP32S3, 1 $7.49
Slide Switch SPDT Surface Mount, Right Angle, 1 $0.92
pcb blank , 2 $6.88
formlabs clear V5 resin, 10 ml $0.79
0 ohm jumper resistor, 1 $0.01
Total: $19.29
adafruit led sequins, 12 $9.48
lipo battery 3.7v 200 mA, 1 $7.95
30 awg silicone stranded wire, 1 $4.95*
UV resin, 1 $8.99*
bar magnets, 4 $0.52
nylon upholstery thread, 1 $1.99*
sew-on snap buttons, 2 $2.40*
heat shrink tubing, 4 $4.95*
scrap fabric from a top I thrifted years ago (I actually found the same top online here! ), ~1 sqft $0**
Total: $41.23
*: price calculated based on qty purchased, not qty used
**: listing this at $0 because crafting is more fun when you repurpose things you already own and don't use. that's what it cost me and i implore anyone who dares to recreate this to do the same
Note: This is the cost of what went into the final version. This is just a fraction of the overall cost if the whole prototyping process were to be accounted for